Dewar, M. J.; Olivella, S.; Stewart, J. J. (). „Mechanism of the Diels-Alder reaction: Reactions of butadiene with ethylene and cyanoethylenes”. Journal of the American Chemical Society. 108 (19): 5771–5779. doi:10.1021/ja00279a018. PMID22175326.
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Dewar, M. J.; Olivella, S.; Stewart, J. J. (). „Mechanism of the Diels-Alder reaction: Reactions of butadiene with ethylene and cyanoethylenes”. Journal of the American Chemical Society. 108 (19): 5771–5779. doi:10.1021/ja00279a018. PMID22175326.